When Is An Ad Starring A Candidate Not About The Candidate?

A new series of ads by the Oregon Democrats raises an interesting question: Is the state party trying to evade campaign finance rules by running so-called "issue ads" -- which ostensibly aren't supposed to be about the candidates -- that just so happen to star their nominee for Senate?
http://tpmelectioncentral.talkingpointsmemo.com/2008/07/when_is_an_ad_st...